MOTOROLA, INC.
EC 212A/D
Card Type | Modem (asynchronous) |
Chip Set | Unidentified |
Maximum Data Rate | 1200bps |
Data Bus | External |
Data Modulation Protocol | Bell 212A |
Error Correction | Unidentified |

CONNECTIONS | ||||||
Function | Label | Function | Label | |||
Line out | CN1 | Unidentified | R1 | |||
Line in | CN2 | Unidentified | SW1 | |||
RS-232/422 | CN3 | |||||
USER CONFIGURABLE SETTINGS | ||
Setting | Label | Position |
í Chassis ground connected to signal ground | JP1 | Pins 2 & 3 closed |
Chassis ground not connected to signal ground | JP1 | Pins 1 & 2 closed |
í Transmit level set to -9 (permissive) | JP2 | Pins 2 & 3 closed |
Transmit level set to programmable | JP2 | Pins 1 & 2 closed |
í Auto-dialer enabled | S2/1 | On |
Auto-dialer disabled | S2/1 | Off |
í XXXT<CR> escape sequence enabled | S2/2 | On |
XXXT <CR> escape sequence disabled | S2/2 | Off |
í Speed set to 1200bps when pin 23 of RS-232 port is high | S2/3 | On |
Pin 23 of RS-232 port ignored | S2/3 | Off |
í Analog loopback test performed when pin 25 of RS-232 port is high | S2/4 | On |
Pin 25 of RS-232 port ignored | S2/4 | Off |
í Disconnect modem on receipt of a long space | S3/3 | On |
Do not disconnect modem on receipt of a long space | S3/3 | Off |
í Do not transmit long space on disconnect | S3/4 | Off |
Transmit long space on disconnect | S3/4 | On |
í Line will not be set busy during test modes | S3/5 | Off |
Line will be set busy during test modes | S3/5 | On |
DTR normal | S3/6 | On |
DTR forced high | S3/6 | Off |
í Disconnect after 150ms loss of carrier | S3/7 | On |
Disconnect after 10s loss of carrier | S3/7 | Off |
í Auto-answer enabled | S3/8 | On |
Auto-answer disabled | S3/8 | Off |
í DTR flow control from modem to DTE | S4/1 | Off |
XON/XOFF flow control from modem to DTE | S4/1 | On |
í DTE to modem flow control disabled | S4/2 | Off |
DTE to modem flow control enabled | S4/2 | On |
HANDSET POLARITY | ||
Setting | JP3 | JP4 |
í Normal | Pins 2 & 3 closed | Pins 2 & 3 closed |
Reversed | Pins 1 & 2 closed | Pins 1 & 2 closed |
ERROR CORRECTION MODE | ||
Setting | S3/1 | S3/2 |
Error correction disabled | Off | Off |
í Error correction enabled | On | Off |
Auto-detect error correction | Off | On |
Auto-detect error correction | On | On |
FLOW CONTROL MODE - MODEM TO DTE | ||
Setting | S4/3 | S4/4 |
í CTS flow control | Off | Off |
XON/XOFF flow control | On | Off |
Pin 11 of RS-232 port | Off | On |
Pin 11 of RS-232 port | On | On |
RCD OPERATION | ||
Setting | S4/5 | S4/6 |
RCD on | Off | Off |
RCD off | On | Off |
í RCD follows data | Off | On |
RCD follows data | On | On |
DATA FORMAT | ||
Setting | S4/7 | S4/8 |
7 data bits, mark parity | Off | Off |
7 data bits, even parity | On | Off |
í 7 data bits, odd parity | Off | On |
8 data bits, no parity | On | On |
DIAGNOSTIC LED(S) | |||
LED | Color | Status | Condition |
EC | Red | On | Error correction enabled |
EC | Red | Off | Error correction disabled |
TR | Red | On | DTR signal is high |
TR | Red | Off | DTR signal is low |
MR | Red | On | Power is on |
MR | Red | Off | Power is off |
TD | Red | On | Modem is transmitting data |
TD | Red | Off | Modem is not transmitting data |
RD | Red | On | Modem is receiving data |
RD | Red | Off | Modem is not receiving data |
HS | Red | On | Modem is operating at 1200bps |
HS | Red | Off | Modem is operating at 300bps |
CD | Red | On | Carrier signal detected |
CD | Red | Off | Carrier signal not detected |
TM | Red | On | Modem is in test mode |
TM | Red | Off | Modem is not in test mode |